As computers became more popular around the same time psychologists were able to compare humans and computers in the way that we process things. For example, computers receive information in a variety of different ways, they are then able to analyse this information and produce a reaction. Like humans, computers do what they are told, process information and can recall information. The main areas of interest in the cognitive approach are memory and changing thinking patterns. Methods of investigation in cognitive psychology are laboratory experiments, interviews, case studies, observations and computer modelling.